Logic Error - JS/TS

If an unhandled error had been thrown in the task, an error object would be passed to the logic and all subsequential ones. The object is called a Railway Error.

Logic Type	Available
Generic logic	✅ (handleError only)
Aggregator logic	✅ (handleError only)

Import and Usage

The handleError function in a logic receives a error argument by default:

JavaScript

export async function run(ctx) {}

export async function handleError(ctx, error) {
    // error is the railway error
}

TypeScript

import {
    GenericContext,
    RailwayError,
} from "@fstnetwork/loc-logic-sdk";

export async function run(ctx: GenericContext) {}

export async function handleError(ctx: GenericContext, error: RailwayError) {
    // error is the railway error
}

Class Reference

Type

• RailwayError (extended from Error)

Properties

Property	Type	Description
name	string	Error name
message	string	Error message
stack	string	Error stack trace message
logicPermanentIdentity	string	Logic permanent ID where error originated
logicRevision	number	Revision of the logic where error originated

Error

Refer to: Error

Examples

Get Error

handleError()

const errorPid = error.logicPermanentIdentity;

const errorMessage = error.message;

const errorStack = error.stack;

Throw Error

throw new Error("oh no, not again.");

The error will be packaged as RailwayError by LOC runtime.